I always thought they did closer to 30. I despise Pearl Jam but I always thought they played like Rush lengths but I could be wrong.

EDIT: I looked for the hell of it, on their last Euro Tour last summer I looked at 3 dates and they played 30, 30 & 28 songs. So this "evening with Pearl Jam" could also be known as "a Pearl Jam tour".

Maybe this time they're including an intermission and that what makes it an evening with.